docs: def chars_after(chars, match):
      """
      Validate the match if right character is in a given sequence.
  
      :param chars:
      :type chars:
      :param match:
      :type match:
      :return:
      :rtype:
      """
      if match.end >= len(match.input_string):
          return True
      return match.input_string[match.end] in chars